Arbitrary File Write | Breaking Cybersecurity News | The Hacker News

cPanel has released patches for a security flaw affecting domain parking and addon domain functionality in cPanel and WebHost Manager (WHM), which could allow code execution as the root user. The vulnerability, assigned the CVE identifier CVE-2026-65643 , impacts all supported versions of cPanel & WHM. cPanel described the issue as a critical security vulnerability and said that an authenticated account holder who can add parked or addon domains can create arbitrary files on the server. "Successful exploitation leads to code execution as the root user, giving an attacker full control of the server," cPanel said in a notification to customers. cPanel has released the following patched versions - 11.110.0.141 or later 11.134.0.53 or later 11.136.0.37 or later 11.138.0.2 or later 11.138.1.7 or later (WP Squared) The notification names WP Squared in its patched list and does not mention DNSOnly. cPanel patched  three separate flaws in July , and ...